Rolling-mill.



D. NISBETL ROLLING MILL. APPLICATION FILED MAR; 11, 1912,

1,047, '13 3. Patented Dec. 10,1912.

6 SHEETSSHEET 1.

' WITNESSES INVENTOR D, P. NISBET. ROLLING MILL. APPLICATION FILED MAR.8, 1912.

5 sums-saline.

wn'usgis EGGS/2E Patented Dec. 10, 1912,

1). F. NISBET. ROLLING MILL. APPIJIOATION FILED MAR. 22, 1912.

1 ,043, 1 33. I Patented Dec. 10, 1912;

5 SHEETS-SHEET 3.

INVENTOR D. P. NISBET, 1 ROLLING MILL. APPLICATION FILED MAR.8, 1912.

1 047 1 3 3 Patented Dec. 10; 1912.

5 SHEET S-SHEET 4.

J kmmm m nals mounted in. boxes 8 on the side's of the UNITED sTA'rEs Pgmm "mm,

DAVID E. NISBET, 0E.CRAFTQN IENNSYLVANIA; ASSIG-NOR. MACK INTQSH HEM? HILL &CO., OF PITTSBURGH, YENNSYLVANIA, A. CORPGRATION OF PENNSYLVANIA.

ROLLING-MILL;

ernias.

To all whom it'maycOnceTn .7 I Be it known that 1, DAV'1D gheny and State of Pennsylvania, acitizen of the United States, have invented or dis-' covered certain new and useful lmprove ments in Rolling-Mills, of which 'i1nprovements the following is a specification.

It has heretofore been the practice to eon-l 'struct three high blooming and roughing such a mill is limited, and when a product for which the grooves, of the rolls were not adapted to producegis desired, a change of rolls is necessary. I

' The invention described herein a-mill of the threehigh type having grooved its upper roll adjustable with referper and lower rolls.

. 'l he invention is hereinafter more fully described and claimed. f i

In the accompanying drawings forming a part of this specification, Figure 1 is' a side elevation of my improved mill; Fig. 2 is an end elevation of the same; Fig. 3 is a sectional elevation, the plane; of section being indicatedby the line III-J11 Fig. 2; Fig. 4 is an end elevation of a portion of the mill illustrating modifications of my improved mill bodying w I p the roll shifting -and ad usting mechanism blooming mills now ingeneral use. I

I In the'practice ofmy invention'thelowe'r roll 1 has-its journalssupported by bearing blocks 2 arranged at the lower ends of the windows in the housings 3. The middle roll t and the. upper roll 5 have their jour 6 and? respectively, said boxes being-vertically movable in guides windows in theliousing. The Imiddle" rollis arranged to be easily movable/up and down as hereinbetore described, by any suitable means known 'in the art. The. construction shownl is suitable for the purpose and "consists of fluid pres sure cylinders 9 suitably supported, and 1 g .Pl gers 10, which are provided with v Specification of Letters Patent. Applicationlfiled March 8, 1912. Serial No. 682,396. l

cross-heads 11,

Nisnirr, re; sidmg at Grafton, in the county of Allerelates to a modification of improvement Figs. 5, 6 and 7. show'elevat1onsot rolls embeing omitted, and Figs. 8-'and9 are sec-- tional and'end elevations ofthree high 1-.atented n e. in, rare.

and I to the cross-heads are secured rods 12 bearing atjt-heir upper ends against-the ournal boxes 6 of the middle roll. By varying the pressure in. the cylinders the middle roll maybe raised or allowed to move down prior to the entrance of the piece in a pass. The journal boxes 7 of the upper roll are yieldingly held against the ends of the adjusting screws 13 by fluid.

pressure cylinders, 14 mounted. on the housings. port a cross-hcad' lo to. which rods 17 are connected, said rods extending down through the caps of the housing and. having their lower ends connected to the journal boxes 7, as clearly shown in Figs. Band 3. .Sufiicienti pressure is maintained in the cylindeis14 The plungers 15 of the cylinderssup-i'v to yieldingly hold the journal boxes against be rotated by any means known in the art. In the construction shown beveled pin; ions 19 are mounted on thescrews and so may move longitudinally through the pinions, but are caused to rotate therewith.- These pinions are rotated by. a reversible motor 20 through suitable interposed gear-- lng. While not limiting the invention in this respect it is preferred to positively drive not only the upper and lower rolls, but also the middle roll, as the frictional contact of they middle roll withthe upper or lower roll as the adjusting screws13, whichipass through nuts 18 in the caps of the housingyand may.

- connected thereto by keys, that the screws hereinafter described, may not be sufiicient ;to overcome the resistance encountered-by the mlddleroll "when heavy reductlon 1s b'e-- ing effected.

As shown-in Fig. 1 the journals or the-several rolls are'connected by spindles 21 to the journals of the pinions '22- in such manner aswill permit the vertical movements of the upper-and middle rolls.

As clearly shownin Fig. 3 the several rolls which are grooved in accordance with rules known in theart, maybe so constructed'and proportioned that the collars of the middle roll will bear upon the corresponding col lars' of the upper or lower rolls, so that at- I each pass the middle roll is supported and reinforced.

The advantages of my improved mill are, that it has as great range of out-put as the two high reversing mill now in use i and avoids the necessity of reversing, the "rolls being always ,driven in" the samedirectione Ziflie advantages as w range of'outpu't as with three high mills having fixed grooved rolls will be'readilyi understood by 'nnlgebraic statement tak ng w as reprefig th wldth of a. pass sndh as repre- Then inthe ing fixed rolls with the number of grooves shown in Fig. 8, only that number of'difier-J products canbe obtained, while in my improved in-ill with the same number of grooves inth'e'rolls, the number of di-fi erent products is indefinitely increased.

In, lieu of constructing the rolls so that thecoilers of the middle roll will bear upon the corresponding. parts of the' upper: and lower rolls, the bones. of the several rolls may be so constructed that those of the-middle rollwill bear onthose of the upper and lower roll when the middle roll is'shifted up and down, as. shown in Fig. 4:.

In Figs. 5,6 and 7, are shown certain modniostions of rolls adapted for use in my improved mill, said: rolls havingthe redue;

ting passes-formed "by grooves in one roll and the plain ungroovedportion ofthe adjoining. roll. it will be understood. that shifting and adjusting mechanism similar to that shown in Figs. 1, 2 and?) will be employed for. operating the middle and uppe rolls shown in Figs. 5,.6 and 7.

By the term pass as used herein is meant :1. construction. whereby the metal is held vas againstmuteriallateral flow during re duction. This may be effected by grooving all of the rolls ossho'wn in Fig. 2, by grooving the outer rolls, the intermediate roll bein plain, asshovvn in Fig. 5, by grooving the intermediate roll, the outer rolls being 5 Witnesses:

plain as shown in Fig. (5, or by grooving one of the outer rolls and the iniddleroll, while he other outer roll preferably the upper roll is plain orung'rooved, as shown in Fig. 7.

While not limiting myself inthis respect it is preferred when employing grooved and plain rollsto form the {asses that the boxes of the middle roll shou d "bear against those of the upper and lower roll, when the. former '55 is shifted, as shown in Figs. 45, 5, 6 and 7.

I. claim-herein as my invention:

1. In a. rolling mill, the combination of a stand of housings, three rolls arranged in said housings said rolls being constructedto form passes adapted to limit the lateral fio W of the metal between the middle andupper and lovver rolls, means for adjusting one of the 'outer rollsirelzitive to the other outer roll, and meansfor shifting the intermediate roll to and fro between the outer rolls.

2. In a rolling mill, the combination ofia stand of housings, three grooved rolls ar-' ranged in said housings,-,and means for adjusting one of the outer rolls relative to the nether outer roll, the-intermediate roll being movable to and fro between the outer rolls.

3. In a rolling mill, the combination of a stand of housings,- three grooved rolls arranged in said housingsfmeans' for edjusting one of the outer rolls relative to the other outer roll, the intermediate roll being movable to and fro betiveen'the other rolls and means for drivingthe outer rolls.

4, In a rolling mill, the combination of a stand ofhousings, three grooved-rolls arranged-1n said housings,'meuns for adjusting one of the outer rolls relative to the other outer roll, the-intermediate roll being movable toand fro between the other rolls and means-for drivin the rolls.

In testimony" vv "ereof, I have hereunto set my hand.

. DAVID F. 'NISBET JAMES W. Hemmron, THOMAS B. JOYCE. 

